net.yama.android.managers.connection.ApplicationException.java Source code

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Here is the source code for net.yama.android.managers.connection.ApplicationException.java

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/*******************************************************************
 * Copyright (c) 2010 Rohit Kumbhar
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *******************************************************************/
package net.yama.android.managers.connection;

import java.net.UnknownHostException;
import java.util.HashMap;
import java.util.Map;

import net.oauth.OAuthProblemException;

import org.json.JSONException;
import org.json.JSONObject;

/**
 * Generic exception
 * @author Rohit Kumbhar
 */
public class ApplicationException extends Exception {

    private static final long serialVersionUID = -1468654093504656108L;

    private static Map<Class<? extends Exception>, String> excpetionMessages = null;

    static {
        excpetionMessages = new HashMap<Class<? extends Exception>, String>();
        excpetionMessages.put(UnknownHostException.class, "Network connection is not available.");
    }

    public ApplicationException(String detailMessage) {
        super(detailMessage);
    }

    public ApplicationException(Throwable throwable) {
        super(throwable);

    }

    public ApplicationException(String detailMessage, Throwable throwable) {
        super(detailMessage, throwable);

    }

    @SuppressWarnings("unchecked")
    @Override
    public String getMessage() {

        Throwable cause = getCause();
        String message = null;

        if (cause != null && cause instanceof OAuthProblemException)
            message = getOAuthMessage((OAuthProblemException) cause);

        if (cause != null && message == null)
            message = getMessageForExceptionClass(cause);

        if (cause != null && message == null)
            message = cause.getMessage();

        if (message == null)
            message = super.getMessage();

        return message;
    }

    /**
     * Returns a string from a static map of knows exceptions and causes.
     * @param cause
     * @return
     */
    @SuppressWarnings("unchecked")
    private String getMessageForExceptionClass(Throwable cause) {

        Class ec = (cause != null) ? cause.getClass() : null;
        if (ec != null && excpetionMessages.get(ec) != null)
            return excpetionMessages.get(ec);

        return null;
    }

    /**
     * Returns a string returned by meetup.com
     * @param ex
     * @return
     */
    private String getOAuthMessage(OAuthProblemException ex) {
        String message = null;

        Map<String, Object> exParams = ex.getParameters();
        for (Map.Entry<String, Object> entry : exParams.entrySet()) {
            String k = entry.getKey();
            Object v = entry.getValue();
            if (k.startsWith("{")) {
                JSONObject json;
                try {
                    json = new JSONObject(k);
                    String details = json.optString("details");
                    message = details;
                    break;
                } catch (JSONException e1) {

                }
            }
        }
        return message;
    }

}